Scalper, grader, and purifier.



110.736,364.' l PATENTBD AUG.18, 1903.-

\ A. CRAIG @L W; GUNNELL.

SGALPER, GRADBR, AND PURIPIER.

` 4 APPLICATION FILED4 .TUNE Z5; 1902.

\ N0 MODEL. l 2 SHEETB-SEEET 1.

`N0. 736,354. PATENTED AUG.'18, 190s.v A, A. CRAIG AAW. GUNNELL. l'

SGALPER, GRADBAL AND BUMPER.

APPLIUATION FILED JUNE 25, 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

UNITED STATES iatented August 18, 1903;.

PATENT OFFICE.

ALVIN CRAIG AND WILLIAM GUNNELL, OF CADIZ, OHIO.

SCALPER, GRADER, AND PURIFIER.

SPECIFICATION forming part of Letters Patent No. 736,364, dated August18, 1903.

Application filed June 25, 1902. Serial No. 1131136. (No modelnl .To @ZZwhom it may concern: Beit known that we,ALv1N CRAIG and WIL- LIAMGUNNELL, citizens of theUnited States, residing at Cadiz, in the countyof Harrison and State of Ohio, have invented certain new and usefulImprovements in Scalpers, Graders, and Purifiers, of which the followingis a specification.

In machines for bolting flour, purifying so middlings, and cleaningcereals it hasl not been feasible to use a current of air with thecleaning machinery when mounted to receive a gyratory movement.

In accordancewith this invention the purifying mechanism is mounted toreceive a gyratory motion, and means are provi ded to' subject thematerial simultaneously to a current of air whereby the operation isrendered effective for scalping, grading, and purifying the zo middlingsand bolting the iiour, and it is pos- 4o fier embodying the invention.

sible to reduce the number of sieves or separating elements. Thisinvention also saves handling of the stock from roll to purifier andback again to roll and enables a minimum amount of power being expendedfor a given result as compared with machinery in general use.

For a full description of the invention'and.`

the merits thereof and also to acquire a knowledge of the details ofconstruction of the means for effecting the result reference is to behad to the following description and drawings hereto attached.

While the essential and characteristic features of the invention aresusceptible of modiiication, still the preferred embodiment of theinvention is illustrated in the accompanying drawings, in which- Figure1 is an elevation of a middlings-puri- Fig. 2 .is a central longitudinalsection of the sieve-box, on a larger scale. Fig. 3 is a verticalsection of the means for imparting a gyratory motion to the sieve-box.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The sieve-box is indicated at 9 and is sus- .5o pended by rods A orother hangers from the venient. An inlet is provided at 1 for theentrance of the break-stock.v

16 indicates the outlet for break-stock'to be passed back to the roll ormill to be reground.

2 is the scalping-sieve, which separates the middlings and flour fromthe break-stock, which drops to the division-board 3 and goes to 4 anddrops to sieve 6. A` current of air enters at 18, passing up through thesieve 6, removing all light, fiuify, and dirty stock that is unfit to bemixed with the flour, and takes it out at the chamber 5 into theair-trunk 14 to the fan 15, which discharges it into a dustcollector orroom. The flour passing out at 7 goes to the liour-chest. The middlingsleave sieve 6 at 20,thorou ghlyd usted, and drop to the sieve 9. Airenters at 1S, passing up through sieve 9, taking from the middlings allthe linecut bran, passing it out into the air-chamber 8, and intoair-trunk 14 to fan 15, into dustcollector or room. At 17 coarsemiddlings leave sieve for roll to be reground. At 10 ne middlings leavemachine for roll to be reground. 12 represents flexible spouts made ofheavy ticking, with a wire coil in to keep spout from collapsing withthe air-suction on them. It gives direct connection from sieve-box 9 toair-trunk V14. 13 and 182 are valves to regulate the air on sieves tosuit the different stock. As many sieves and valves as are necessary tohandle the stock can be placed in sievebox.

The actuating means for the sieve-box may be briefly stated as follows:

B is the balance-wheel,wrist-pin dislnwristpin, and bearing.

C C forms the journal at the lower end of B and runs in box D, which isfilled with oil.

E is wrist-pin that is connected to sievebox 9. l

F is weight to counterbalance the sievebox 9.

G is a rod to hold ,weight F, which can be moved in or out to balancethe sieve-box when in motion.

H is spindle that drives the machine and is made fast in the plate B,runs through box D at J, and has three-eighths inch clearance at J.

N forms the journal and runs in bearing K, which is babbitted, which canbe adjusted to TCO points C C as they Wear by set-screws L, that arefastened to wedge M. At the end of the spindle is a box, as box D.

A machine constructed in accordance with this invention will scalp,grade, and purify the middlings and bolt the iiour from the breakstockand ground middlings. It takes the place of the scalping-reels,flour-dressers, or boltingreels and purifiers. It is three machines inone and will do more and better work than any other machine for siftingflour. The current of air passing through each sieve keeps an eventemperature in the machine at all times. By its rotary motion all lightand fluffy stock works on top of the heavier stock. The aircurrentpassing through the sieve takes it all out of the machine to thedustcollector, leaving a clean stock to bolt, which gives the machine agreater capacity than any other sifter and a clean er flour. Theair-current is so arranged that the miller has full control of it. By asystem of valves he can adjust the current of air to suit each sieve.

The stock isV very gently handled, no forcing or rubbing is done, as inmany sifter improved machines, having ample cloth surface to handle itgently, having the rotary motion with air-suction, thereby giving itgreater ea pacity than any other machine on the market.

Having thus described the invention, what is claimed as new is- Amiddlings-puriiier comprising aclosed sieve-box, suspending meanstherefor, operating means for imparting a gyratory motion to thesieve-box, a scalping-sieve within the upper portion of the box, aninlet for the break-stock, an outlet from the opposite end of thescalping-sieve extended through the box and its bottom,oppostely-inclined separating-sieves belowT the scalping-sieve,returnboards belowr the several sieves, valved inlets opening into thebox at points intermediate of the separating-sieves and the respectivereturn-boards, air-chambers above the respective separating-sieveshaving their lower sides perforated throughout their extent, a station?ary air-trunk, means for creating a suction therethrough, and valvedconnections between the air-chambers and air-trunk having iiexibleportions, substantially as specified.

In testimony whereof we affix our signatures in presence of twowitnesses.

ALVIN CRAIG. u Y L. s. WILLIAM GUNNELL. L. s.

Witnesses:

W. H. LEMMON, PARscAL KERR.

